#include <REGX52.H>

void Delay1ms(unsigned int xms)	//@12.000MHz
{
	unsigned char i, j;
	while(xms)
		{
			i = 2;
			j = 239;
			do
			{
				while (--j);
			} while (--i);	
			xms--;
		}
}


void main()
	{
		while(1)
			{
			  P2=0xFE;//1111 1110
				Delay1ms(500);
				P2=0xFD;//1111 1101
				Delay1ms(500);
			  P2=0xFB;//1111 1011
				Delay1ms(500);
			  P2=0xF7;//1111 0111
				Delay1ms(100);
			  P2=0xEF;//1110 1111
				Delay1ms(100);
			  P2=0xDF;//1101 1111
				Delay1ms(50);
				P2=0xBF;//1011 1111
				Delay1ms(1);
				P2=0x7F;//0111 1111
			}

	}